[en] ICT (Information and Communication Technologies) addiction is a very discussed topic today which mainly concerns parents and educators. As the mobile phone is within these technologies, apart from knowing the use made of this, the main objective of this study is to find a possible correlation between mobile phone use and academic achievement. To this end, a sample of 39 students from 5th and 6th year of Primary Education that belong to the Basque Autonomous Community has been used. The results show the existence of such correlation, so with the aim of emphasizing prevention, certain keys are provided to prevent the development of an addictive behaviour.